The NP-P401W supports a maximum resolution of 1600 x 1200 (UXGA). That's over six times the resolution of the most frequently found supported graphics resolutions of 640 x 480 (VGA) (which is also supported by this projector). In addition, this data projector support supported graphics resolutionss of 1024 x 768 (XGA), 1280 x 1024 (SXGA) and 1400 x 1050 (SXGA+) and 800 x 600 (SVGA).
A 1600 x 1200 (UXGA) supported graphics resolutions is in fact the best supported resolution amongst all multimedia projectors that are a similar age to the NP-P401W.
The worst supported resolution across similar types of projector is 640 x 480 (VGA).